Glenn O'Brien (March 2, 1947 – April 7, 2017) was an American writer who focused largely on the subjects of art, music and fashion. He was featured for many years as "The Style Guy" in GQ magazine, and published a book with that title.

He worked as an editor at a number of publications, and published the arts and literature magazine Bald Ego from 2003–2005.

In his early years, he was a member of Andy Warhol's Factory. He was the first editor of Interview from 1971 to 1974.[3] After his departure, he continued to write for the magazine and returned as editor several times, with a nearly 20-year association with the title. He was a music critic for the publication in the punk era for which he penned the influential column "Glenn O'Brien's Beat".[4]

In 1980–1981, he wrote the screenplay (which he also co-produced with Patrick Montgomery) for a film to be called New York Beat, starring Jean-Michel Basquiat[5] (The film was not released until 2000, as "Downtown 81"), with post-production managed by O'Brien and Maripol.[6]

After leaving "TV Party" in addition to continuing his writing career, he attempted a stint as a stand up comedian, and was a contributing editor of Allure, Harper's Bazaar, and Creative Director of advertising at Barneys New York.[11] For 10 years, he wrote a monthly column for ArtForum Magazine. He edited Madonna's book, Sex.[11]